package com.lzj.myvideo.common;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;

import java.io.Serializable;

//保证序列化json的时候,如果是null的对象,key也会消失
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
public class ServerResponse<T> implements Serializable {
    private int status;
    private String msg;
    private T data;

    private ServerResponse(int status){
        this.status = status;
    }

    private ServerResponse(int status,String msg){
        this.status = status;
        this.msg = msg;
    }

    private ServerResponse(int status,T data){
        this.status = status;
        this.data = data;
    }

    private ServerResponse(int status,String msg,T data){
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public int getStatus() {
        return status;
    }

    public String getMsg() {
        return msg;
    }

    public T getData() {
        return data;
    }

    //判断当前状态是否成功.成功返回true.失败返回false
    //使isSuccess返回值不被序列化,因为该方法不需要被转化成json对象
    @JsonIgnore
    public Boolean isSuccess(){
        return this.status == ResponseCode.SUCCESS.getCode();
    }

    //返回成功的ServerResponse对象.
    public static<T> ServerResponse<T> createBySuccess(){
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode());
    }
    public static<T> ServerResponse<T> createBySuccess(String msg){
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode(),msg);
    }
    public static<T> ServerResponse<T> createBySuccess(T data){
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode(),data);
    }
    public static<T> ServerResponse<T> createBySuccess(String msg,T data){
        return new ServerResponse<>(ResponseCode.SUCCESS.getCode(),msg,data);
    }

    //返回失败的ServerResponse对象.
    public static<T> ServerResponse<T> createByError(){
        return new ServerResponse<>(ResponseCode.ERROR.getCode(),ResponseCode.ERROR.getDesc());
    }
    public static<T> ServerResponse<T> createByError(String msg){
        return new ServerResponse<>(ResponseCode.ERROR.getCode(),msg);
    }
    public static<T> ServerResponse<T> createByError(int status,String msg){
        return new ServerResponse<>(status,msg);
    }
    public static<T> ServerResponse<T> createByErrorCodeMessage(int errorCode,String msg){
        return new ServerResponse<>(errorCode,msg);
    }

}
